简介：DistributionandaccumulationofNd,anditseffectonsecretionofprogesteroneinmicewerestudiedusingradioisotopetracer(147Nd)technique.Followingsingleintraperitonealadministrationofneodymiumtracedwith147Ndatadoseof200mg*kg-1,unevendistributionoftheradioactiveNdoccurredinvarioustissuesandorgans.Muchamountof147Ndaccumulatesinthebone,andtheresidueincreaseswiththelapseoftime.Someamountofradioactivitywasalsodetectedineyes,bloodandbrain,buttheaccumulationdecreasedwiththetimeduetoexcretionandre-distributioninmice.Incomparisonwithcontrols,concentrationofprogesteroneisfoundtobesignificantlylowerintheserumofadministeredmice,indicatingasignificantlyinhibitoryeffectofNdonsecretionofprogesterone.
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